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FW: changes to zdump.c and zic.c invocations of is.* macros
by Olson, Arthur David (NIH/NCI) [E] Dec. 9, 2005

Dec. 9, 2005

-----Original Message----- From: Robert Elz [mailto:kre@munnari.OZ.AU] Sent: Tuesday, December 06, 2005 10:20 PM To: Arthur David Olson Cc: tz(a)lecserver.nci.nih.gov Subject: Re: changes to zdump.c and zic.c invocations of is.* macros Date: Tue, 6 Dec 2005 13:35:15 -0500 (EST) From: Arthur David Olson <olsona(a)elsie.nci.nih.gov> Message-ID: <200512061835.jB6IZFWH007741(a)elsie.nci.nih.gov> | ! while (isascii((unsigned char) *cp) && You sometimes do better if you write that as while (isascii(*(unsigned char *)cp) && It can also be a little clearer what you're intending - there's no intention here to fetch the char, then convert it to unsigned, all we want is the 0..255 value that cp points at. Than again, and I haven't looked at the code again just now to see if it is practical or not, but an alternative might just be to declare cp as being unsigned char * right from the start (even if that means that it needs to stop being an input parameter, and instead be copied from one which would need to remain char * to avoid changing the API). kre ps: I don't think Paul's suggested variation is really the right thing to do - it is certainly true that it's possible to test for digits by using >= '0' && <= '9' tests - but if that's the best way to write it, then that's what isdigit() ought to be doing. If you want to make it shorter, it is safe to stop the isascii() test if the arg is known to be unsigned char which after this change, it will be (or EOF, but that's irrelevant here). Paul's version may be textually shorter, but with that cp++ side effect buried in the middle of the && sequence, it is not nearly as easy to read.

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proposed bad-URL changes for antarctica, australasia, and southamerica
by Arthur David Olson Dec. 8, 2005

Dec. 8, 2005

Here are changes to the antarctica, australasia, and southamerica files to document problems with some URLs. (The "chkurls" additions convince a software tool to skip checks of these URLs.) --ado ------- antarctica ------- *** /tmp/geta17431 Thu Dec 8 11:16:54 2005 --- /tmp/getb17431 Thu Dec 8 11:16:54 2005 *************** *** 1,4 **** ! # @(#)antarctica 7.25 # From Paul Eggert (1999-11-15): # To keep things manageable, we list only locations occupied year-round; see --- 1,4 ---- ! # @(#)antarctica 7.26 # From Paul Eggert (1999-11-15): # To keep things manageable, we list only locations occupied year-round; see *************** *** 59,68 **** # Australia - territories # Heard Island, McDonald Islands (uninhabited) # previously sealers and scientific personnel wintered ! # <a href="http://www.dstc.qut.edu.au/DST/marg/daylight.html"> # Margaret Turner reports # </a> (1999-09-30) that they're UTC+5, with no DST; # presumably this is when they have visitors. # # year-round bases # Casey, Bailey Peninsula, -6617+11032, since 1969 --- 59,69 ---- # Australia - territories # Heard Island, McDonald Islands (uninhabited) # previously sealers and scientific personnel wintered ! # <a href="http://www.dstc.qut.edu.au/DST/marg/daylight.html" chkurls="nocheck"> # Margaret Turner reports # </a> (1999-09-30) that they're UTC+5, with no DST; # presumably this is when they have visitors. + # [ADO: no nameserver entry for www.dstc.qut.edu.au on 2005-12-08.] # # year-round bases # Casey, Bailey Peninsula, -6617+11032, since 1969 *************** *** 139,147 **** 0 - zzz 1956 Nov 10:00 - DDUT # Dumont-d'Urville Time # Reference: ! # <a href="http://www.icair.iac.org.nz/science/reports/fr/IFRTP.html"> # Support and Development of Polar Research and Technology (1997-02-03) # </a> # Germany - year-round base --- 140,149 ---- 0 - zzz 1956 Nov 10:00 - DDUT # Dumont-d'Urville Time # Reference: ! # <a href="http://www.icair.iac.org.nz/science/reports/fr/IFRTP.html" chkurls="nocheck"> # Support and Development of Polar Research and Technology (1997-02-03) # </a> + # [ADO: no nameserver entry for www.icair.iac.org.nz on 2005-12-08.] # Germany - year-round base *************** *** 156,163 **** # # From Hideyuki Suzuki (1999-02-06): # In all Japanese stations, +0300 is used as the standard time. [See] ! # <a href="http://www.crl.go.jp/uk/uk201/basyo.htm">[reference in Japanese]</a> # and information from KAMO Hiroyasu. # # Syowa station, which is the first antarctic station of Japan, # was established on 1957-01-29. Since Syowa station is still the main --- 158,167 ---- # # From Hideyuki Suzuki (1999-02-06): # In all Japanese stations, +0300 is used as the standard time. [See] ! # <a href="http://www.crl.go.jp/uk/uk201/basyo.htm" chkurls="nocheck">[reference in Japanese]</a> # and information from KAMO Hiroyasu. + # [ADO: no nameserver entry for www.crl.go.jp on 2005-12-08; + # www.crl.co.jp may be what was meant, but page is not there either.] # # Syowa station, which is the first antarctic station of Japan, # was established on 1957-01-29. Since Syowa station is still the main ------- australasia ------- *** /tmp/geta17450 Thu Dec 8 11:16:55 2005 --- /tmp/getb17450 Thu Dec 8 11:16:55 2005 *************** *** 1,4 **** ! # @(#)australasia 7.74 # This file also includes Pacific islands. # Notes are at the end of this file --- 1,4 ---- ! # @(#)australasia 7.75 # This file also includes Pacific islands. # Notes are at the end of this file *************** *** 551,559 **** # Australia ! # <a href="http://www.dstc.qut.edu.au/DST/marg/daylight.html"> # Australia's Daylight Saving Times # </a>, by Margaret Turner, summarizes daylight saving issues in Australia. # From John Mackin (1991-03-06): # We in Australia have _never_ referred to DST as `daylight' time. --- 551,560 ---- # Australia ! # <a href="http://www.dstc.qut.edu.au/DST/marg/daylight.html" chkurls="nocheck"> # Australia's Daylight Saving Times # </a>, by Margaret Turner, summarizes daylight saving issues in Australia. + # [ADO: no nameserver entry for www.dstc.qut.edu.au on 2005-12-08.] # From John Mackin (1991-03-06): # We in Australia have _never_ referred to DST as `daylight' time. *************** *** 962,970 **** # From Paul Eggert (1999-09-27): # The Information Service of the Australian National Standards Commission ! # <a href="http://www.nsc.gov.au/InfoServ/Ileaflet/il27.htm"> # Daylight Saving # </a> page (1995-04) has an excellent overall history of Australian DST. # The Community Relations Division of the NSW Attorney General's Department # publishes a history of daylight saving in NSW. See: # <a href="http://www.lawlink.nsw.gov.au/crd.nsf/pages/time2"> --- 963,972 ---- # From Paul Eggert (1999-09-27): # The Information Service of the Australian National Standards Commission ! # <a href="http://www.nsc.gov.au/InfoServ/Ileaflet/il27.htm" chkurls="nocheck"> # Daylight Saving # </a> page (1995-04) has an excellent overall history of Australian DST. + # [ADO: no nameserver entry for www.nsc.gov.au on 2005-12-08.] # The Community Relations Division of the NSW Attorney General's Department # publishes a history of daylight saving in NSW. See: # <a href="http://www.lawlink.nsw.gov.au/crd.nsf/pages/time2"> ------- southamerica ------- *** /tmp/geta17468 Thu Dec 8 11:16:55 2005 --- /tmp/getb17468 Thu Dec 8 11:16:55 2005 *************** *** 1,4 **** ! # @(#)southamerica 7.63 # This data is by no means authoritative; if you think you know better, # go ahead and edit the file (and please send any changes to --- 1,4 ---- ! # @(#)southamerica 7.64 # This data is by no means authoritative; if you think you know better, # go ahead and edit the file (and please send any changes to *************** *** 526,535 **** # to help dealing with the shortages of electric power. # # From Paul Eggert (1998-02-25): ! # <a href="http://churchnet.ucsm.ac.uk/news/files2/news165.htm"> # Brazil Prepares for Papal Visit # </a>, # Church Net UK (1997-10-02). # # Decree 2,317 (1997-09-04), adopted by same states. Rule Brazil 1997 only - Oct 6 0:00 1:00 S --- 526,536 ---- # to help dealing with the shortages of electric power. # # From Paul Eggert (1998-02-25): ! # <a href="http://churchnet.ucsm.ac.uk/news/files2/news165.htm" chkurls="nocheck"> # Brazil Prepares for Papal Visit # </a>, # Church Net UK (1997-10-02). + # [ADO: request to churchnet.ucsm.ac.uk times out 2005-12-08.] # # Decree 2,317 (1997-09-04), adopted by same states. Rule Brazil 1997 only - Oct 6 0:00 1:00 S

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proposed tz changes to eliminate electronic mail addresses
by Arthur David Olson Dec. 8, 2005

Dec. 8, 2005

Below find proposed changes to eliminate electronic mail address (except for tz.*(a)elsie.nci.nih.gov) from the time zone files. If I can believe grep, this catches them all. --ado ------- antarctica ------- *** /tmp/geta17786 Thu Dec 8 11:36:56 2005 --- /tmp/getb17786 Thu Dec 8 11:36:56 2005 *************** *** 1,4 **** ! # @(#)antarctica 7.26 # From Paul Eggert (1999-11-15): # To keep things manageable, we list only locations occupied year-round; see --- 1,4 ---- ! # @(#)antarctica 7.27 # From Paul Eggert (1999-11-15): # To keep things manageable, we list only locations occupied year-round; see *************** *** 107,113 **** # France - year-round bases # ! # From Antoine Leca <Antoine.Leca(a)Renault.FR> (1997-01-20): # Time data are from Nicole Pailleau at the IFRTP # (French Institute for Polar Research and Technology). # She confirms that French Southern Territories and Terre Adelie bases --- 107,113 ---- # France - year-round bases # ! # From Antoine Leca (1997-01-20): # Time data are from Nicole Pailleau at the IFRTP # (French Institute for Polar Research and Technology). # She confirms that French Southern Territories and Terre Adelie bases *************** *** 300,306 **** # Normally it wouldn't have a separate entry, since it's like the # larger Antarctica/McMurdo since 1970, but it's too famous to omit. # ! # From Chris Carrier <72157.3334(a)CompuServe.COM> (1996-06-27): # Siple, the first commander of the South Pole station, # stated that he would have liked to have kept GMT at the station, # but that he found it more convenient to keep GMT+12 --- 300,306 ---- # Normally it wouldn't have a separate entry, since it's like the # larger Antarctica/McMurdo since 1970, but it's too famous to omit. # ! # From Chris Carrier (1996-06-27): # Siple, the first commander of the South Pole station, # stated that he would have liked to have kept GMT at the station, # but that he found it more convenient to keep GMT+12 ------- asctime.c ------- *** /tmp/geta17805 Thu Dec 8 11:36:57 2005 --- /tmp/getb17805 Thu Dec 8 11:36:57 2005 *************** *** 1,6 **** /* ** This file is in the public domain, so clarified as of ! ** 1996-06-05 by Arthur David Olson (arthur_david_olson(a)nih.gov) */ /* --- 1,6 ---- /* ** This file is in the public domain, so clarified as of ! ** 1996-06-05 by Arthur David Olson. */ /* *************** *** 11,17 **** #ifndef lint #ifndef NOID ! static char elsieid[] = "@(#)asctime.c 7.31"; #endif /* !defined NOID */ #endif /* !defined lint */ --- 11,17 ---- #ifndef lint #ifndef NOID ! static char elsieid[] = "@(#)asctime.c 7.32"; #endif /* !defined NOID */ #endif /* !defined lint */ ------- asia ------- *** /tmp/geta17824 Thu Dec 8 11:36:57 2005 --- /tmp/getb17824 Thu Dec 8 11:36:57 2005 *************** *** 1,4 **** ! # @(#)asia 7.88 # This data is by no means authoritative; if you think you know better, # go ahead and edit the file (and please send any changes to --- 1,4 ---- ! # @(#)asia 7.89 # This data is by no means authoritative; if you think you know better, # go ahead and edit the file (and please send any changes to *************** *** 85,91 **** # Shanks has Yerevan switching to 3:00 (with Russian DST) in spring 1991, # then to 4:00 with no DST in fall 1995, then readopting Russian DST in 1997. # Go with Shanks, even when he disagrees with others. Edgar Der-Danieliantz ! # <edd(a)AIC.NET> reported (1996-05-04) that Yerevan probably wouldn't use DST # in 1996, though it did use DST in 1995. IATA SSIM (1991/1998) reports that # Armenia switched from 3:00 to 4:00 in 1998 and observed DST after 1991, # but started switching at 3:00s in 1998. --- 85,91 ---- # Shanks has Yerevan switching to 3:00 (with Russian DST) in spring 1991, # then to 4:00 with no DST in fall 1995, then readopting Russian DST in 1997. # Go with Shanks, even when he disagrees with others. Edgar Der-Danieliantz ! # reported (1996-05-04) that Yerevan probably wouldn't use DST # in 1996, though it did use DST in 1995. IATA SSIM (1991/1998) reports that # Armenia switched from 3:00 to 4:00 in 1998 and observed DST after 1991, # but started switching at 3:00s in 1998. ------- australasia ------- *** /tmp/geta17843 Thu Dec 8 11:36:57 2005 --- /tmp/getb17843 Thu Dec 8 11:36:57 2005 *************** *** 1,4 **** ! # @(#)australasia 7.75 # This file also includes Pacific islands. # Notes are at the end of this file --- 1,4 ---- ! # @(#)australasia 7.76 # This file also includes Pacific islands. # Notes are at the end of this file *************** *** 1050,1056 **** # Lord Howe Island # From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06): ! # LHI... [ Courtesy of Pauline Van Winsen.. pauline@Aus ] # [ Dec 1990 ] # Lord Howe Island is located off the New South Wales coast, and is half an # hour ahead of NSW time. --- 1050,1056 ---- # Lord Howe Island # From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06): ! # LHI... [ Courtesy of Pauline Van Winsen ] # [ Dec 1990 ] # Lord Howe Island is located off the New South Wales coast, and is half an # hour ahead of NSW time. *************** *** 1090,1096 **** # From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06): # # The Country of New Zealand (Australia's east island -) Gee they hate that! # # or is Australia the west island of N.Z. ! # # [ courtesy of Geoff Tribble.. Geofft@Aus.. Auckland N.Z. ] # # [ Nov 1990 ] # ... # Rule NZ 1974 1988 - Oct lastSun 2:00 1:00 D --- 1090,1096 ---- # From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06): # # The Country of New Zealand (Australia's east island -) Gee they hate that! # # or is Australia the west island of N.Z. ! # # [ courtesy of Geoff Tribble.. Auckland N.Z. ] # # [ Nov 1990 ] # ... # Rule NZ 1974 1988 - Oct lastSun 2:00 1:00 D ------- localtime.c ------- *** /tmp/geta17862 Thu Dec 8 11:36:58 2005 --- /tmp/getb17862 Thu Dec 8 11:36:58 2005 *************** *** 1,18 **** /* ** This file is in the public domain, so clarified as of ! ** 1996-06-05 by Arthur David Olson (arthur_david_olson(a)nih.gov) */ #ifndef lint #ifndef NOID ! static char elsieid[] = "@(#)localtime.c 7.96"; #endif /* !defined NOID */ #endif /* !defined lint */ /* ! ** Leap second handling from Bradley White (bww(a)k.gp.cs.cmu.edu) ! ** POSIX-style TZ environment variable handling from Guy Harris ! ** (guy(a)auspex.com) */ /*LINTLIBRARY*/ --- 1,17 ---- /* ** This file is in the public domain, so clarified as of ! ** 1996-06-05 by Arthur David Olson. */ #ifndef lint #ifndef NOID ! static char elsieid[] = "@(#)localtime.c 7.97"; #endif /* !defined NOID */ #endif /* !defined lint */ /* ! ** Leap second handling from Bradley White. ! ** POSIX-style TZ environment variable handling from Guy Harris. */ /*LINTLIBRARY*/ *************** *** 208,214 **** ** Except for the strftime function, these functions [asctime, ** ctime, gmtime, localtime] return values in one of two static ** objects: a broken-down time structure and an array of char. ! ** Thanks to Paul Eggert (eggert(a)twinsun.com) for noting this. */ static struct tm tm; --- 207,213 ---- ** Except for the strftime function, these functions [asctime, ** ctime, gmtime, localtime] return values in one of two static ** objects: a broken-down time structure and an array of char. ! ** Thanks to Paul Eggert for noting this. */ static struct tm tm; *************** *** 1411,1417 **** ** Adapted from code provided by Robert Elz, who writes: ** The "best" way to do mktime I think is based on an idea of Bob ** Kridle's (so its said...) from a long time ago. - ** [kridle(a)xinet.com as of 1996-01-16.] ** It does a binary search of the time_t space. Since time_t's are ** just 32 bits, its a max of 32 iterations (even at 64 bits it ** would still be very reasonable). --- 1410,1415 ---- *************** *** 1422,1428 **** #endif /* !defined WRONG */ /* ! ** Simplified normalize logic courtesy Paul Eggert (eggert(a)twinsun.com) */ static int --- 1420,1426 ---- #endif /* !defined WRONG */ /* ! ** Simplified normalize logic courtesy Paul Eggert. */ static int *************** *** 1722,1728 **** t = time2(tmp, funcp, offset, &okay); #ifdef PCTS /* ! ** PCTS code courtesy Grant Sullivan (grant(a)osf.org) */ if (okay) return t; --- 1720,1726 ---- t = time2(tmp, funcp, offset, &okay); #ifdef PCTS /* ! ** PCTS code courtesy Grant Sullivan. */ if (okay) return t; ------- private.h ------- *** /tmp/geta17881 Thu Dec 8 11:36:58 2005 --- /tmp/getb17881 Thu Dec 8 11:36:58 2005 *************** *** 4,10 **** /* ** This file is in the public domain, so clarified as of ! ** 1996-06-05 by Arthur David Olson (arthur_david_olson(a)nih.gov) */ /* --- 4,10 ---- /* ** This file is in the public domain, so clarified as of ! ** 1996-06-05 by Arthur David Olson. */ /* ------- tzfile.5 ------- *** /tmp/geta17900 Thu Dec 8 11:36:58 2005 --- /tmp/getb17900 Thu Dec 8 11:36:58 2005 *************** *** 133,138 **** in the file. .SH SEE ALSO newctime(3) ! .\" @(#)tzfile.5 7.11 .\" This file is in the public domain, so clarified as of ! .\" 1996-06-05 by Arthur David Olson (arthur_david_olson(a)nih.gov) --- 133,138 ---- in the file. .SH SEE ALSO newctime(3) ! .\" @(#)tzfile.5 7.12 .\" This file is in the public domain, so clarified as of ! .\" 1996-06-05 by Arthur David Olson. ------- tzfile.h ------- *** /tmp/geta17919 Thu Dec 8 11:36:59 2005 --- /tmp/getb17919 Thu Dec 8 11:36:59 2005 *************** *** 4,10 **** /* ** This file is in the public domain, so clarified as of ! ** 1996-06-05 by Arthur David Olson (arthur_david_olson(a)nih.gov) */ /* --- 4,10 ---- /* ** This file is in the public domain, so clarified as of ! ** 1996-06-05 by Arthur David Olson. */ /* *************** *** 21,27 **** #ifndef lint #ifndef NOID ! static char tzfilehid[] = "@(#)tzfile.h 7.17"; #endif /* !defined NOID */ #endif /* !defined lint */ --- 21,27 ---- #ifndef lint #ifndef NOID ! static char tzfilehid[] = "@(#)tzfile.h 7.18"; #endif /* !defined NOID */ #endif /* !defined lint */ *************** *** 105,111 **** #ifdef NOSOLAR /* ** Must be at least 14 for Europe/Riga as of Jan 12 1995, ! ** as noted by Earl Chew <earl(a)hpato.aus.hp.com>. */ #define TZ_MAX_TYPES 20 /* Maximum number of local time types */ #endif /* !defined NOSOLAR */ --- 105,111 ---- #ifdef NOSOLAR /* ** Must be at least 14 for Europe/Riga as of Jan 12 1995, ! ** as noted by Earl Chew. */ #define TZ_MAX_TYPES 20 /* Maximum number of local time types */ #endif /* !defined NOSOLAR */ ------- usno1989a ------- *** /tmp/geta17938 Thu Dec 8 11:36:59 2005 --- /tmp/getb17938 Thu Dec 8 11:36:59 2005 *************** *** 1,9 **** ! # @(#)usno1989a 7.3 # # From Arthur David Olson (1994-02-07): # # Here's time zone information from the United States Naval Observatory, ! # with corrections from Paul Eggert (eggert(a)twinsun.com) # The USNO warns: # DUE TO FREQUENT CHANGES IN THE LOCAL LAWS GOVERNING DAYLIGHT # SAVING TIME, WE CANNOT GUARANTEE THE ACCURACY OF THIS --- 1,9 ---- ! # @(#)usno1989a 7.4 # # From Arthur David Olson (1994-02-07): # # Here's time zone information from the United States Naval Observatory, ! # with corrections from Paul Eggert. # The USNO warns: # DUE TO FREQUENT CHANGES IN THE LOCAL LAWS GOVERNING DAYLIGHT # SAVING TIME, WE CANNOT GUARANTEE THE ACCURACY OF THIS ------- usno1995 ------- *** /tmp/geta17957 Thu Dec 8 11:36:59 2005 --- /tmp/getb17957 Thu Dec 8 11:36:59 2005 *************** *** 1,4 **** ! # @(#)usno1995 7.4 # # From Arthur David Olson (1995-12-21): # --- 1,4 ---- ! # @(#)usno1995 7.5 # # From Arthur David Olson (1995-12-21): # *************** *** 323,327 **** Zaire Shaba: +2 hours Zambia: +2 hours Zimbabwe: +2 hours ! All timezone information is non-authoritative. Send corrections to: ! res(a)tuttle.usno.navy.mil --- 323,326 ---- Zaire Shaba: +2 hours Zambia: +2 hours Zimbabwe: +2 hours ! All timezone information is non-authoritative... ------- usno1997 ------- *** /tmp/geta17976 Thu Dec 8 11:36:59 2005 --- /tmp/getb17976 Thu Dec 8 11:36:59 2005 *************** *** 1,4 **** ! # @(#)usno1997 7.6 # # From Arthur David Olson (1997-03-07): # --- 1,4 ---- ! # @(#)usno1997 7.7 # # From Arthur David Olson (1997-03-07): # *************** *** 324,328 **** Zaire Shaba: +2 hours Zambia: +2 hours Zimbabwe: +2 hours ! All timezone information is non-authoritative. ! Send corrections to: res(a)tuttle.usno.navy.mil --- 324,327 ---- Zaire Shaba: +2 hours Zambia: +2 hours Zimbabwe: +2 hours ! All timezone information is non-authoritative... ------- usno1998 ------- *** /tmp/geta17995 Thu Dec 8 11:37:00 2005 --- /tmp/getb17995 Thu Dec 8 11:37:00 2005 *************** *** 1,4 **** ! # @(#)usno1998 7.3 # # From Arthur David Olson (1998-05-26): # --- 1,4 ---- ! # @(#)usno1998 7.4 # # From Arthur David Olson (1998-05-26): # *************** *** 324,328 **** Zaire Shaba: +2 hours Zambia: +2 hours Zimbabwe: +2 hours ! All timezone information is non-authoritative. ! Send corrections to: res(a)tuttle.usno.navy.mil --- 324,327 ---- Zaire Shaba: +2 hours Zambia: +2 hours Zimbabwe: +2 hours ! All timezone information is non-authoritative... ------- zic.c ------- *** /tmp/geta18014 Thu Dec 8 11:37:00 2005 --- /tmp/getb18014 Thu Dec 8 11:37:00 2005 *************** *** 1,4 **** ! static char elsieid[] = "@(#)zic.c 7.125"; /* ** Regardless of the type of time_t, we do our work using this type. --- 1,4 ---- ! static char elsieid[] = "@(#)zic.c 7.126"; /* ** Regardless of the type of time_t, we do our work using this type. *************** *** 1648,1654 **** typecnt = 0; charcnt = 0; /* ! ** Thanks to Earl Chew (earl(a)dnd.icp.nec.com.au) ** for noting the need to unconditionally initialize startttisstd. */ startttisstd = FALSE; --- 1648,1654 ---- typecnt = 0; charcnt = 0; /* ! ** Thanks to Earl Chew ** for noting the need to unconditionally initialize startttisstd. */ startttisstd = FALSE;

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FW: FW: Re: Timezone name translations
by Olson, Arthur David (NIH/NCI) [E] Dec. 8, 2005

Dec. 8, 2005

-----Original Message----- From: Mark Davis [mailto:mark.davis@icu-project.org] Sent: Wednesday, December 07, 2005 1:05 PM To: Arthur David Olson Cc: tz(a)lecserver.nci.nih.gov Subject: Re: FW: Re: Timezone name translations Addressing the message: I would recommend using the TZIDs as is -- not try to invent new ones. You mention stability as being a concern: what we do in CLDR is to canonicalize the TZIDs for translation by choosing a particular one out of all the equivalent names (a choice we guarantee to be stable). Translating all of the TZIDs for all the languages is onerous, so for the zone identifiers in countries that only have a single zone, we leverage the country translations that we already have. We then can prioritize the translation of TZIDs that are in multizone countries. This information is then used in formatting the names, as per the following: http://www.unicode.org/draft/reports/tr35/tr35.html#Time_Zone_Fallback (This is the working draft of the next version, so modified text is in yellow). As an example of the data, see the translations in http://unicode.org/cldr/data/common/main/el.xml. Search for <territories> to see the translated country names. Search for <timeZoneNames> to see the translations for multizone countries (or particular other cases). Mark P.S. The abbreviations are ambiguous -- and not readily translated without introducing even further ambiguities -- so I would not recommend them for translation. Arthur David Olson wrote: >This message failed to make it out to the list. > > --ado > >From: Chuck Soper [chucks2(a)veladg.com] > >At 8:01 PM +0700 12/3/05, Stuart Bishop wrote: > > >>Paul Eggert wrote: >> >> > One problem with gettext format is that there might be multiple > >>translations for the same English-language abbreviation. For example, >> >> >>> "IST" is short for either Israel Standard Time or for India Standard >>>Time, and it's possible that the acronyms in (say) Russian would be >>>different. Hence gettext("IST") might not work as the user would >>>expect, in a Russian locale. >>> >>> >>This is a problem even without localization. But I won't be tackling >>abbreviations anyway - it would involve first mapping and translating >>each historical period in each timezone to an English sentence to cope >>with the duplicate abbreviations and the patalogical cases like >>Australian Eastern Standard Time and Australian Eastern Daylight >>Savings Time (still breaking code to this day). >> >> > >I'm interested in the display of time zone names both in English and localized. It seems like trying to provide a time zone name for each tzID (std/dst) might be fairly laborious because there are almost 400 tzIDs (in the zone.tab file). I'm considering building a time zone name table based time on abbreviations and UTC offsets. Each row in the table could have a tz abbreviation, a UTC offset and a time zone name. For example, one row could contain CET, UTC+1 and 'Central European Standard Time'. There are 34 tzIDs that use CET at UTC+1 during some time of the year. Instead of trying to maintain 34 tz names for 34 tzIDs why not maintain one tz name for an abbreviation and a UTC offset? Another example is Argentina. Doesn't Argentina have two tz names for its 10 tzIDs? For localized tz names, additional tables would be created. > >I understand that an abbreviation by itself is not unique (e.g. IST, EST, etc.), but the combination of an abbreviation and a UTC offset might be unique. Does anyone know if the abbreviation/UTC offset combination is unique? Clearly, tzIDs are unique, but they're not very stable and there are a lot of them. > >I believe that the abbreviation/UTC offset combination actually holds more information than a tzID. For example, PWT/UTC-7 (during World War II) could display Pacific War Time. The tzID by itself does not contain that information. Also, using only the tzID might produce some unneeded names if names are created tzID/dst combinations that do not exist. > >I'm interested to find out if people think this approach might be effective for building and maintaining a list of time zone names. > >Chuck > > > > > >

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changes to zdump.c and zic.c invocations of is.* macros
by Arthur David Olson Dec. 6, 2005

Dec. 6, 2005

Below are proposed changes to zic.c and zdump.c to avoid compiler warnings about invocations of the is.* macros, to meet standard requirements for calling the macros, and to make the invocations consistent. I plan to deal with gettext issues in the next round of changes. --ado ------- zic.c ------- *** /tmp/geta6691 Tue Dec 6 11:01:47 2005 --- /tmp/getb6691 Tue Dec 6 11:01:47 2005 *************** *** 1,4 **** ! static char elsieid[] = "@(#)zic.c 7.124"; /* ** Regardless of the type of time_t, we do our work using this type. --- 1,4 ---- ! static char elsieid[] = "@(#)zic.c 7.125"; /* ** Regardless of the type of time_t, we do our work using this type. *************** *** 2046,2053 **** emalloc((int) ((strlen(cp) + 1) * sizeof *array)); nsubs = 0; for ( ; ; ) { ! while (isascii(*cp) && isspace((unsigned char) *cp)) ! ++cp; if (*cp == '\0' || *cp == '#') break; array[nsubs++] = dp = cp; --- 2046,2054 ---- emalloc((int) ((strlen(cp) + 1) * sizeof *array)); nsubs = 0; for ( ; ; ) { ! while (isascii((unsigned char) *cp) && ! isspace((unsigned char) *cp)) ! ++cp; if (*cp == '\0' || *cp == '#') break; array[nsubs++] = dp = cp; *************** *** 2210,2217 **** */ cp = string; wp = NULL; ! while (isascii(*cp) && isalpha(*cp)) ! ++cp; if (cp - string == 0) wp = _("time zone abbreviation lacks alphabetic at start"); if (noise && cp - string > 3) --- 2211,2219 ---- */ cp = string; wp = NULL; ! while (isascii((unsigned char) *cp) && ! isalpha((unsigned char) *cp)) ! ++cp; if (cp - string == 0) wp = _("time zone abbreviation lacks alphabetic at start"); if (noise && cp - string > 3) *************** *** 2220,2228 **** wp = _("time zone abbreviation has too many alphabetics"); if (wp == NULL && (*cp == '+' || *cp == '-')) { ++cp; ! if (isascii(*cp) && isdigit(*cp)) ! if (*cp++ == '1' && *cp >= '0' && *cp <= '4') ! ++cp; } if (*cp != '\0') wp = _("time zone abbreviation differs from POSIX standard"); --- 2222,2232 ---- wp = _("time zone abbreviation has too many alphabetics"); if (wp == NULL && (*cp == '+' || *cp == '-')) { ++cp; ! if (isascii((unsigned char) *cp) && ! isdigit((unsigned char) *cp)) ! if (*cp++ == '1' && ! *cp >= '0' && *cp <= '4') ! ++cp; } if (*cp != '\0') wp = _("time zone abbreviation differs from POSIX standard"); ------- zdump.c ------- *** /tmp/geta6709 Tue Dec 6 11:01:48 2005 --- /tmp/getb6709 Tue Dec 6 11:01:48 2005 *************** *** 1,4 **** ! static char elsieid[] = "@(#)zdump.c 7.70"; /* ** This code has been made independent of the rest of the time --- 1,4 ---- ! static char elsieid[] = "@(#)zdump.c 7.71"; /* ** This code has been made independent of the rest of the time *************** *** 209,215 **** return; cp = abbrp; wp = NULL; ! while (isascii(*cp) && isalpha(*cp)) ++cp; if (cp - abbrp == 0) wp = _("lacks alphabetic at start"); --- 209,215 ---- return; cp = abbrp; wp = NULL; ! while (isascii((unsigned char) *cp) && isalpha((unsigned char) *cp)) ++cp; if (cp - abbrp == 0) wp = _("lacks alphabetic at start"); *************** *** 219,227 **** wp = _("has more than 6 alphabetics"); if (wp == NULL && (*cp == '+' || *cp == '-')) { ++cp; ! if (isascii(*cp) && isdigit(*cp)) ! if (*cp++ == '1' && *cp >= '0' && *cp <= '4') ! ++cp; } if (*cp != '\0') wp = _("differs from POSIX standard"); --- 219,228 ---- wp = _("has more than 6 alphabetics"); if (wp == NULL && (*cp == '+' || *cp == '-')) { ++cp; ! if (isascii((unsigned char) *cp) && ! isdigit((unsigned char) *cp)) ! if (*cp++ == '1' && *cp >= '0' && *cp <= '4') ! ++cp; } if (*cp != '\0') wp = _("differs from POSIX standard");

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FW: Re: Timezone name translations
by Arthur David Olson Dec. 6, 2005

Dec. 6, 2005

This message failed to make it out to the list. --ado From: Chuck Soper [chucks2(a)veladg.com] At 8:01 PM +0700 12/3/05, Stuart Bishop wrote: >Paul Eggert wrote: > > > One problem with gettext format is that there might be multiple > > translations for the same English-language abbreviation. For example, >> "IST" is short for either Israel Standard Time or for India Standard >> Time, and it's possible that the acronyms in (say) Russian would be >> different. Hence gettext("IST") might not work as the user would >> expect, in a Russian locale. > >This is a problem even without localization. But I won't be tackling >abbreviations anyway - it would involve first mapping and translating >each historical period in each timezone to an English sentence to cope >with the duplicate abbreviations and the patalogical cases like >Australian Eastern Standard Time and Australian Eastern Daylight >Savings Time (still breaking code to this day). I'm interested in the display of time zone names both in English and localized. It seems like trying to provide a time zone name for each tzID (std/dst) might be fairly laborious because there are almost 400 tzIDs (in the zone.tab file). I'm considering building a time zone name table based time on abbreviations and UTC offsets. Each row in the table could have a tz abbreviation, a UTC offset and a time zone name. For example, one row could contain CET, UTC+1 and 'Central European Standard Time'. There are 34 tzIDs that use CET at UTC+1 during some time of the year. Instead of trying to maintain 34 tz names for 34 tzIDs why not maintain one tz name for an abbreviation and a UTC offset? Another example is Argentina. Doesn't Argentina have two tz names for its 10 tzIDs? For localized tz names, additional tables would be created. I understand that an abbreviation by itself is not unique (e.g. IST, EST, etc.), but the combination of an abbreviation and a UTC offset might be unique. Does anyone know if the abbreviation/UTC offset combination is unique? Clearly, tzIDs are unique, but they're not very stable and there are a lot of them. I believe that the abbreviation/UTC offset combination actually holds more information than a tzID. For example, PWT/UTC-7 (during World War II) could display Pacific War Time. The tzID by itself does not contain that information. Also, using only the tzID might produce some unneeded names if names are created tzID/dst combinations that do not exist. I'm interested to find out if people think this approach might be effective for building and maintaining a list of time zone names. Chuck

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Re: Timezone name translations
by Paul Eggert Dec. 6, 2005

Dec. 6, 2005

Chuck Soper <chucks2(a)veladg.com> writes: > Does anyone know if the abbreviation/UTC offset combination is > unique? I wouldn't count on it. Does "PST" mean "Pacific Standard Time" or "Pitcairn Standard Time"? They're both 8 hours behind UTC. Or, if you want something a bit more obscure, "LMT" at 36 minutes and 32 seconds behind UTC can mean either "Local Mean Time" or "Lisbon Mean Time", depending on the zone and year. Neither of these examples are of major economic importance right now, but they do indicate the assumption isn't safe.

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RE: Tzcode2005p.tar.gz and tzdata2005p.tar.gz
by Olson, Arthur David (NIH/NCI) [E] Dec. 5, 2005

Dec. 5, 2005

Thanks; I'll incorporate that in the next round. --ado -----Original Message----- From: Paul Eggert [mailto:eggert@CS.UCLA.EDU] Sent: Monday, December 05, 2005 4:34 PM To: Olson, Arthur David (NIH/NCI) [E] Cc: tz(a)elsie.nci.nih.gov Subject: Re: Tzcode2005p.tar.gz and tzdata2005p.tar.gz I suggest the following one-line comment change to the systemv file, the next time it gets published. It addresses two issues. First, the "before" in the old comment is backwards, as the US DST changes occurred after (not before) the old System V rules were written. Second, we now have two sets of US changes (1987 and 2007), not one, so the comment shouldn't imply that the 1987 changes were the only ones. --- systemv 2005/11/29 19:04:59 2005.16 +++ systemv 2005/12/05 21:29:02 2005.16.0.1 @@ -4,7 +4,7 @@ # No attempt is made to handle Newfoundland, since it cannot be expressed # using the System V "TZ" scheme (half-hour offset), or anything outside # North America (no support for non-standard DST start/end dates), nor -# the change in the DST rules in the US in 1987 (which occurred before +# the changes in the DST rules in the US after 1976 (which occurred after # the old rules were written). # # If you need the old rules, uncomment ## lines.

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Tzcode2005p.tar.gz and tzdata2005p.tar.gz
by Olson, Arthur David (NIH/NCI) [E] Dec. 5, 2005

Dec. 5, 2005

The files... ftp://elsie.nci.nih.gov/pub/tzcode2005p.tar.gz ...and... ftp://elsie.nci.nih.gov/pub/tzdata2005p.tar.gz ...are now available. These reflect the "systemv", "tz-link.htm", and "zdump.c" changes circulated last week on the time zone mailing list (less the casts of arguments to the is* macros). My hope is to do a bit more cleanup by the end of the year: 1. Reflect on and then incorporate the zdump.c changes from Robin Kawabata. 2. Finish off the work on zones such as EST5EDT. 3. Finish the work of purging electronic mail address. 4. Fix (or at least annotate) dead URLs in the data files. Once 2006 rolls around I'll have another go at getting consensus on 64-bit changes. --ado

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URL glitches in data files
by Arthur David Olson Dec. 5, 2005

Dec. 5, 2005

Below find information on five glitchy URLs (one of which appears twice) in the time zone data files. I struck out in my browser spelunking effort to find replacements. If anyone knows of working versions, let me know; absent that, I'll add appropriate notes to the data file. --adO <html> <body> <pre> antarctica: http://www.icair.iac.org.nz/science/reports/fr/IFRTP.html; NSLOOKUP FAILS # Reference: # <a href="http://www.icair.iac.org.nz/science/reports/fr/IFRTP.html"> # Support and Development of Polar Research and Technology (1997-02-03) # </a> australasia: http://www.nsc.gov.au/InfoServ/Ileaflet/il27.htm; NSLOOKUP FAILS # From Paul Eggert (1999-09-27): # The Information Service of the Australian National Standards Commission # <a href="http://www.nsc.gov.au/InfoServ/Ileaflet/il27.htm"> # Daylight Saving # </a> page (1995-04) has an excellent overall history of Australian DST. antarctica: http://www.crl.go.jp/uk/uk201/basyo.htm; NSLOOKUP FAILS (www.crl.co.jp exists; changing co to go above still fails.) # From Hideyuki Suzuki (1999-02-06): # In all Japanese stations, +0300 is used as the standard time. [See] # <a href="http://www.crl.go.jp/uk/uk201/basyo.htm">[reference in Japanese]</a> # and information from KAMO Hiroyasu. antarctica: http://www.dstc.qut.edu.au/DST/marg/daylight.html; NSLOOKUP FAILS # Australia - territories # Heard Island, McDonald Islands (uninhabited) # previously sealers and scientific personnel wintered # <a href="http://www.dstc.qut.edu.au/DST/marg/daylight.html"> # Margaret Turner reports # </a> (1999-09-30) that they're UTC+5, with no DST; # presumably this is when they have visitors. australasia: http://www.dstc.qut.edu.au/DST/marg/daylight.html; NSLOOKUP FAILS # <a href="http://www.dstc.qut.edu.au/DST/marg/daylight.html"> # Australia's Daylight Saving Times # </a>, by Margaret Turner, summarizes daylight saving issues in Australia. southamerica: http://churchnet.ucsm.ac.uk/news/files2/news165.htm; NSLOOKUP WORKS; TIMES OUT # From Paul Eggert (1998-02-25): # <a href="http://churchnet.ucsm.ac.uk/news/files2/news165.htm"> # Brazil Prepares for Papal Visit # </a>, # Church Net UK (1997-10-02).

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